Automatic stopping mechanism



Dec. 11,1923. 1

L. Y. SQUIBB AUTOMATIC- STOPPIYNG MECHANISM Original Filed Aug. a,-1e14ji INMENTR flgw/Zb,

WITNESSES ATTORNEIY I,

20 r after the machine has been in operation for a predetermined periodslightly greater than I Patented Dec. in, 192s.

mm "s- 'rEs Y IC morn Y. SQUIlBB, or mm, NEW ,nmsnr, assxen'oa T0vrc'roa TALKING Macnmn comran'r, A CORPORATIQN or new quasar.

aurom'rm srorrme mncna'nrsml Application filed August a, 1914, Serialm.,a55,7ea. Renewed ma 1, 192a;

To all whom it may concern:

Be it known that- I, LLOYD Y. citizen of the United States, and

SQUIBB, a

. of the city of Camden, county of Camden,

State of New Jersey, have invented oertaln new and useful Improvementsin Automatic Stopping'Me'chanism, of which the following is aspecification; 1;

4 One object" of this invention is to provide in combinationwith-stoppin mechanism ineluding anelement-movable rom anon-stop into asto ping position and retaining 1 1 1 2515 for holdi ig the element in anon-stopping position, improved releasing ,means for actuating theretaining means to release the element from a' non-stopping positions:

A further object of this invention isfto provide improved means forautomatically effecting the release of an automatic switch of anelectrically actuated talking machine,

that necessary for reproducin the sounds from the largest record capableof being operated by the talking machine, case the switch should not bereleased immediately after the reproduction ofsounds from the record,the automatic releasing or release. the switch' shortly i afterwards toavoid a waste of current.

Other objects of this invention will appear hereinafter.

In the accompanying drawings Fig. 1 is a top plan view of an improvedtiming mechanism constructed. in accordance with this invention andapplied in combination with an automaticswitch adapted for useupon atalking machine or other device; gig. 2 is a section of the same-on line2-2 of 1 Referring to the drawings, one embodiment of thisinvention isshown as applied .to a talking machine including a vertical turntablespindle 5, arranged to be rotated about a fixed axis coincident tudinalaxis by any suitable electrical motor (not shown) and adapted to su portand to rotate a turntable for carrying t usual disc a resident lowerportion of the 'casing.l5 which is so that in insulated from the switchwith its longi-- sound recordin combination with an automatic switchcomprising a substantially flat stopping vmember 11, 1

loosely through the switch lever' l1- and tightly through the base-plm6. Foremanually resetting the. switch lever, the switch 'lever isprovided at its. outer end with a handle 13.- Arranged'below thebase:plate 6 and coaxial with and surrounding the pivot 12'is a cylindricalthe under surface' screws 16; i

Arranged within the casing -15 are two stationary terminals-17 and 18,which are rigidly clamped against of the base plate 6 by adapted to beelectrically connected respectively to suitable wires or electricalcon-f ductors 19 and 20 forming part of the circuit of the electricmotor casing 15 and loosely surrounding the pivot 12f-and insulatedtherefrom, 'is' a rotary (not shown) which actuates the turntablespindle. Within the laminated switch member 21 arranged to cooperatewith the stationary term nals 17 and r 18 to open or close the motorcircuit, the

switch member 21 being arran ed to be oscillated in response to theoscillation of the switch lever 11 by means of a collar 22 surroundingthe pivot 12 and secured to but I member 21, and

provided with a lug .23 ro ecting upwardly therefrom and the jectsloosely through an arcuate slot 24 provided therefor in the base plate 6and engages loosely in an aperture 24' provided upper end of whichprotherefor in the switch lever 11. 'The aperture 24',is elongated topermit of a limited amount of rotatio of the 'switch lever 11independently of t e lug 23, so that when the switch lever ,is rotatedanti-clockwise from an on position'towards'a-n ofl position, itwi'llrotate through a short are independently of the lug 23 andWill-then normally effective to or by both to stopping when the tone armreaches a predeter-- The releasing 7 ing switch stop member 11 is wardlyfrom the tone arm ment between the switch lever 11 and the.

lug 23, less force is required to beapplied through thespring 29 and alighter and more easily elongated spring 29 maybe used than wouldotherwise be required.

For automatically actuating the switch lever 11 to break the motorcircuit in responseto a predetermined movement of the swingin tone arm(not shown) of the talk mac ine, 25 is arranged above swing in a planeparallel thereto about a vertical pivot 26 extending through one end ofthe latch and fixedly secured in an extension of the base plate 6.' Thelatch 25 is provided at its free end with a tooth 27 arranged to engagesnugly in a'correspondmg notch 28in the switch lever 11 to hold theswitch lever or stopping member in a nod stopping or closed position. Aspiral spring 29 is secured at one end to the lever 11 and at itsotherend to the latch 25, and is normally held in an extend ed conditiontending to rotate the switch lever 11 in an anticlockwise direction toopen the motor circuit. The spring 29 also tends to rotate the latch 25in a clockwise direction when the tooth 21 is in engagement with thenotch 28; and the spring is hold the-tooth 27 in engagement in the notch28 when the switch lever 11 is in a non-stopping or on p0Sition as shownin Fig. 1. The outer side ed e 27 of the tooth'27 is slightly beveledand the corresponding wall of the notch 28 is correspondingly beveled sothat when the forced either manually or automatically in ananti-clockwise direc tion the tooth 27 of the retaining member 25 willbe forced out of-the notch 28, and out of engagement with the abutmentformed by the coacting wall of the notch 28, and the stop member 11 willbe free to be moved by the handle 13 or by the spring 29 osition. Forautomatica ly re easing the switch 11, a releasin arm 30 is arranged toswing coaxially with the latch 25 in a fixed path about the pivot 26,and cooperates in a wellkn'own manner with the latch25 and with a stud31 carried by and projecting down- (not shown) to swing the latch 25 inan anti-clockwise direction to release the switch lever 11 and to permitthe switch lever 11 to be swung in an anticlockwise direction by thespring 29 mined point in its travel. arm 30 is rotatably adjustable withrespect a latch or retaining member,

the base plate 6 to to the latch 25 to be engaged by the stud .31 toeffect the release of the switch lever 11 at any desired point ofmovement of the tone arm, and is preferably adjusted in any particularcase to 'efiect the release of the switch lever 11 immediately after thesound reproducer carried by the tone arm has completed the reproductionof sounds recorded on the record.

To avoid a waste of current in case the releasing arm 30 of thehereinbefore described automatic switch mechanism should fail to performits function within the proper limit of time, this invention providesimproved automatic timing mechanism so combined with the hereinbeforedescribed releasing mechanism as to positivelyrelease the switch lever11 after the talking machine has operated for a predetermined periodslightly longer than that necessary for reproducing the largest recordfor which the talking machine is designed.

This improved timing mechanism includes an actuating member such as a Iratchet wheel 35, which is arranged in a horizontal plane spacedslightly above the plane of the base plate 6 and is rigidly secured tothe upper end of a vertical ratchet shaft 36, which projects through thebase plate 6, and which is arranged to be rotated about a fixed verticalaxis coincident with its longitudinal axis to rotate the ratchet 35 in aclockwise direction.

The lower end of the ratchet shaft 36 is connected in any suitablemanner to be rotated at a predetermined rate of speed withrespect to theturntable spindle 5 of the talking machine. Forinstance, the lower endof the ratchet shaft 36 may be provided with a worm gear 38 rigidlysecurcd thereto and engaging a worm 39 on one end of a horizontal shaft40, to the other end of which is rigidly secured a worm gear 41 engaginga worm 42 coaxial with and rigidly secured to the turntable spindle 5,the horizontal shaft 40 being arranged to rotate about a fixed axiscoincident with its longitudinal axis and being held againstlongitudinal movement in fixed terminal bearings 43.

For transmitting movement from the ratchet wheel 35 to the latch 25 torelease the switch lever 11, a pawl-like kick off lever or releasingmember 50 is arranged substantially in a plane'with the ratchet wheel35, to oscillate in a. fixed plane about a vertical pivot 51 extendingapproximately centrally therethrough and which is rigidly secured at itsupper end to one end of an arm comprising a substantially flat carrierplate or supporting member 52, which is arranged to swing in ahorizontal plane slightly above the plane-of the upper surface of theratchet wheel 35 about avertical pivot 53, which extends through theother. end of the said arm or carrier plate and the lowerend of cured tothe switch lever 11. .The oscilla; tion of the pawl-like kick ofl? lever50 with respectto the carrier plate 52 is limited in a clockwisedirection by a lug. or stop 55 integral with and projecting upwardlyfrom the kick ofi lever and arranged to engage against a side edge ofthe carrier plate, 52. An auxiliaryspi'ral spring 56 is connected at oneend to the lug 55 and at its other end" to a lug 57 integral with andprojecting upwardly from. the switch lever 11, and tends to hold thekick off lever 50 at the limit of its clockwise movement" with respectto the carrier plate 52. This auxiliary spring 56 also tends to swingthe tion with respect to the switch lever 11 and 25 and is into engaement with a lug or sto 58 integral wit and pro'ecting-upwar y from thebase plate 6 and arranged to limit the anti-clockwise -movement of thecarrier plate 52 with respect to the switch lever 11, and the auxiliaryspring 56 thus tends to Hold-the pawl-like outer end 59 of the kick-,ofi' lever 5.0 inengagement with the.

ing front walls '66 of the teeth 67 of the ratchet 35 are preferablysubstantially cylindrical and of the sameradius of curvature, and theback walls 68 of the teeth of the ratchet 35 are flat and substantiallytangent to the front walls 66, to provide I relativelybroad bearingsurfaces and to in sure smoothness parts. end 62 of the kick 01f? leveris also preferably cylindrical to insure smoothness of operation betweenthe kick off lever and the flat shoulder 63 of the latch 25. i

To insure the movement of the switch lever from an on to an 01fposition, in

case the spring 29 should fail to perform its,

a rigid function after the latch 25 has been releasedkick off levervfrom the switch lever,- the 50 is provided with alug 60 integral andtherewith and projecting upwardly therefrom and arranged to limittheanticlockwise movement of the kick ofi' lever 50 with respect to thecarrier plate 52 by engaging againstthe outer end wall 61 of the carrierplate52.- lncase of the remote contingency that the spring 29 should i1to perform its function of swinging t e switch lever 11 from an on to anof.

which is rigidly se-,

carrier plate 52 in an anti-clockwise dirie'c move the anti-clockwisedirection of operation between these The activeend wall 69 of the innerbe operative as it to swing'the carrier plate 52 suddenly "in lever .50has performed its function of releasing the-latch 25 from the switchlever 11 as will appear hereinafter, the continued rotation of theratchet 35 rotates the lug 60 into engagement with the wall 61 of thecarrier plate 52 and then causes'the carrier plate 52 to push theswitchlever '11 from an on to an ofi' p'osition..

This mechanism is also operative to release the stop member 11 from theretaining the member 25 if for any reason the end 62 positionimmediately" after the kick oil' of the kick-off lever 50 should notengage the projection 64 of the latch or retainin v 2 member 25 andshould thus fail to lift the retaining member to release the stop membertherefrom. In the event that the end- 62 of the kick-01f lever 50 shouldfail to engage the projection 64 to lift the latch 25 I (if,for-instance; the end 62 of the kick-ofl' lever were to be broken off orbent laterally so as to permit it -to slide over or under'the projection64 without lifting the latch) then therotation of the ratchet 35 wouldturn the pawl'50 about its pivot 51 until the lug 60 engages the outerend wall 61 of the plate or'connection 52.whereupon the continuedrotation of the ratchet 35 would h pawl 50 and plate 52 (now rigid witrespect to each other) to theright.

Since the plate or. connection 52 is pivoted to the arm or extension ofthe stop member \11, the movement of these members to the right wouldturn the stop member 11 in an forcing the beveled wall or abutment ofthe notch 28 against the beveled. end 27 of the tooth 27 and cause thesaid tooth to slide upwardly thereon. As soon as thetooth 27 is outofthe notch 28, the spring 29 'will immedi atelyact to throw the stopmember 11 to stopping position;

lever 11 froman off or stopping-position into an on or non-stoppingposition without rotating the ratchet 35 anti-clockwise or backwards,the outer side edge of the carrier plate 52 is extended laterally and"providing an ab-; ruptly inclined comparative-1y short straight and asomewhat forms [an obtuse angle shoulder or cam surface 70 longerstraight inclined edge wall or cam surface 71 extending the shoulderoutwardly in a direction approximately radial with i'espect to the axisof the pivot 53 at the inner end of the carrierplate 52, and

0 permit of the resetting of the switch from the outer end of forming anacute-angle with the longitudinal axisof the carrier plate; This s itextends outwardly diately outside of the rier plate 52 when the a-n'onor non-stopping position, and will slides over the stop 58 from a pointimmeoulder.70 is so arranged that stop-58 for the carswitch leverll isin i its operative 50 and parts cooperating '25 is released, the carrierplate or arm rotated in a clock 'rection from an in engagement with thefree end of the latch 'clockwiseby the auxiliary spring a clockwisedirection and move the outer end 59 of the kick ofi? lever 50 out of thepath of the teeth of the ratchet 35 as'the switch lever is moved from anon towards an 03 position. The inclined edge wall 71 is so arranged andof such a length that it will be operative to slide over the stop 58 andhold the inner end 59 of the kick ofi lever 50 out of the path of theteeth of the ratchet 35.

The ratchet 35 and the kick oli lover therewith are so proportioned thatwhen the latch 25 isi in position to retain the switch. lever innon-stopping position (as shown in the drawings) and the kick off lever-50 is in engagement with the ratchet 35, a partial rotation oftheratchet in a clockwise direction, in response to the rotation of theturntable spindle through a predetenninec number of revolutions somewhatgreater than necessary to reproduce the sounds from the longest'recordwhich the machine is adapted to receive, will cause a he kick off lever50 in ratchetto rotate t an anti-clockwise direction about ts'pivot 63of the latch 25 and release the latch from the switch lever v11.

During this movement of the kick off lever 50 in response'to theclockwise rota tion of the ratchet '35, and until the latch 52 iswise'direction away from and about the pivot 53 which is.

its stop 58 When the held in a stationary position. latch25 is releasedthe switch lever 11 is ordinarily rotated in an anti-clockwise dioninto. an off position of the action of the spring 29. his movement ofthe switch lever 11 from an on into an oil position cuts o the currentfrom the motor, tion of the motor and consequently the totation of theratchet 35, and moves the carrier plate or arm 52 anti-clockwise aboutits pivot 53 as the shoulder and the inclined edge 71 successively slideover the stop 58 and simultaneously end 59 of the kick ofi lever50 outof the path of the teeth of the ratchet 35, thus rmitting the kick oillever to be rotated 56 until the stop of the kick ofi. lever comes intoengagement with the carrier plate 52, where it remains while the switchlever is in the off position. When the switch lever 11 is in astopping-or rier plate or arm 52 rests with the outer portion of itsinclined edge 71 against the stop 58 and holds the outer end.59 of thekick oil lever out of the path of the teeth of the ratchet 35.

' tween two teeth of tooth of the vided with any other number oftimerequired for releasing stops the opera.

moves the outer f the invention without oil position, the carnon-stoppmgposition, means to move said released from said movable .When the switchlever clockwise from a stopping or into a non-stopping or I the motorand the rotation of the turntable spindle 5, the carrier plate -52 isalso moved and its inclined edge 71 slides on the stop 58, keeping theouter end 59 of the kick off. lever 50 out of the path of the teeth ofthe ratchet 35, but when, in its continued movement the abrupt. shoulder70 slides over the stop 58 the outer end 59 of the kick off lever movesdown into engagement with the ratchet.

In the form of this invention shown in the drawings, the ratchet isprovided with nine teeth and the construction is such that the manualmovement of the switch lever 11 from an ofi position into an on positionresults inv the movement of the kick 0E position 1 off lever 50 into itsinitial position in which its outer end 59 is in the space be tially incontact with the front wall 66 of one of the teeth. o

The ratchet 35 might, however, be prothat shown in the drawings, and thedevice would still operate successfully, although in some cases the kickoil lever 50, when in an initial operative position, would not rest withits outer end 59 in in a recess between two teeth as shown in thedrawings, but would rest with its outer end 59 riding either upon thetop or upon the back wall of a tooth, and the kick oil lever would notbe rotated with respect to the carrier plate 52 until the ratchet hadrotated through a sufficient arc to permit the outer end of the kick offlever to move into full engagement between two teeth and to be engagedby of the teeth of the ratchet. By thus varying the number of teethinthe switch lever 11 through the action of the kick off lever 50 might bevaried.

the front wall 66 of one is moved manually on position to start theratchet and substanteeth than full engagement the ratchet 35, the

It is to be-understood that this invention is not limited to thespecific construct-ion hereinbefore described, as it is evident thatvarious changes might be made in applying departing from the spirit ofthe invention or the scope of the appended claims.

Having thus fully described this invention, I claim and desire toprotect by Letters Patent of the United States:

1. Automatic stopping mechanism comprising an element movable from anonstopping into a stopping position, movable means arranged to holdsaid element in a a movable ed to be or actuating said movable means torelease said element, said releasing means being con I neeted to saidelement and arranged to be element in a said element when released bysaid movable means.

2. Automatic stopping mechanism com-' said movable means.

a from a non-stopping 3. Automatic stopping mechanism comprising incombination an element movable tion, movable means arranged to hold saidelement in a non-stopping position, means to move said element, whenreleased from said movable means, to a stopping position, arotatablemember,

member for actuating said movable means to release said element, saidreleasing means comprising an element connected to and movable withrespect to said first-mentioned 'element out of operative engagementwith said rotatable member when said element is moved to an inoperativeposition.

4. In an automatic combination of a stopping member, retaining means tohold-said stopping member in non-stopping position, a spring tending tomove said stopping member to stopping position, acontinuouslyrotating-ratchet, an arm connected to said stopping member,a pawl member inengagement with said ratchet. and connections betweensaid arm and said pawl whereby the rotation of said ratchet first movessaid pawl member into rigid relation with respect to said arm, and

- the continued rotation of said ratchet moves said arm and pawltogether to force said stopping member out of engagement with saidretaining means.

5. Automatic stopping mechanism comprising in combination an elementmovable from a non-stopping into a stopping position, movable meansarranged to hold said element in a non-stopping position, means tomovesaid said movable means, into stopping position, a ratchet wheelrotatable about a fixed axis,

and releasing means arranged to be actu ated by said ratchet wheel foractuating moved out of operative engagement with sald movable member bythe movement oflawn, movable means arranged to ho d element, whenreleased from and arfixed axis for holding said into a stopping post andreleasing means ar-v .ranged to be actuated by. said rotatable stopmechanism, the

said pivoted means to element, when released from said movable means torelease'said element, said releasing means, being arranged to be movedinto and outof operative engagement with said ratchet wheel by themovement of said element. l

6. Automatic stopping mechanism corm. prising in combination an elementmovable f rom a non-stopping into a stoppin posii sa1 element in anon-stopping position, means to move said element, when released fromsaid movable means, into stopping position, a' ratchet wheel rotatableabout a fixed axis, and releasing means connected to said element andarranged to be actuated by said ratchet wheel for actuating said movablemeans to release said element. p

7, Automatic stopping mechanism comprising in combination an elementmovable from a non-stopping into a stoppin posi tion, a member pivotedto swing a outaelement in anon-stopping position, means to move saidelement, when released from said pivoted member, into sto ping position,a ratchet wheel rotatable ab v leasing means connected to said elementand arranged to be actuated by the teeth of said ratchet wheel toactuate'said out a fixedaxis, and re- 8. Automatic stopping mechanismcomprising in combination an element pivoted to swing about a fixed axisfrom a nonstopping into a stopping position, means pivoted to swingabout a fixed-axis for holding said element in a non-stopping position,means to move said element, when released from said pivoted means,into'stopping position, a ratchet wheel rotatable about 'afixed axis,and releasing means arranged to be moved into and out of operativeengagement with said ratchet :wheel by the movement of said element, andarranged to be actuated by said ratchet wheel to actuate release saidelement. 9, Automatic stopping mechanism comprising in combination anelement arranged to oscillate about a fixed axis from a nonstopping intoa stopping position, movable means arranged to hold said element in anon-stopping position, means to'move said element, when released fromsaid movable means, into stopping position, a ratchet wheel rotatableabout a fixed axis, and a member arranged to engage and to be actuatedby said ratchet wheel and to engage and actuate said movable means, saidmember being arranged to be moved into and out of operative engagementwith said ratchet wheel by the movement of said element.

10. Automatic stopping mechanism comprising in combination an elementarrangednon-stopping position,

. able means to release said able with respect means to move saidelement, when released from said movable means, into stopping position,a ratchet wheel rotatable about a fixed axis, and releasing meansincluding a member arranged to engage and to be actuated by said ratchetwheel and to engage and actuatesaid movelement, said member beingconnected to said element and being arranged to be moved into and out ofoperative engagement with said ratchet wheel by the movement of saidelement.

11. Automatic stopping mechanism comprising in combination an elementarranged to oscillate about a fixed axis from a nonstopping into astopping position, movable means arranged to hold said element in anon-stopping position, a ratchet wheel rotatable about a fixed axis, asupporting member connected to and movable with respect to said element,a releasing member carried by and arranged to oscillate with respect tosaid supporting member and arranged to engage and be actuated by saidratchet wheel and to engage and actuate said movable means to releasesaid element, and-means to move said element when released, intostopping position.

12. Automatic stopping mechanism comprisin in combination an elementarranged to oscillate about a fixed axis from a nonstopping into astopping position, movable means arranged to hold said element in anon-stopping position,'a ratchet wheel rotatable about a fixed axis,means to rotate said ratchet wheel, a supporting mem ber connected toand movable with respect to said element, a releasing member carried byand arranged to oscillate with respectto said supporting member andarranged to engage and be actuated by said ratchet wheel and to engageand actu'ate said movable means to release said element, and yieldingmeans connecting said releasing member and said element.

13. Automatic stopping mechanism comprising in combination an elementarranged to swing about a fixed axis from a non-stopping into a stoppingposition, means movto said element for holding said element in anon-stopping position, means to move said element, when released fromsaid movable means, into stopping position, a ratchet wheel rotatableabout a fixed axis, means arranged to rotate said ratchet wheel, asupporting member pivot ally connected to said element and arranged tooscillate with respect thereto, a fixed stop arranged to be engaged bysaid supporting member, a releasing member pivotally con nected to saidsupporting member and rotatable with respect thereto, a stop carried bysaid releasing member and arranged to engage said supporting'member, andyielding means connecting said second mentioned stop and said element,said releasing Ymember being arranged to be actuated by said ratchetwheel to actuate said movable means to release said element and saidsupporting member being arranged to slide against said fixed stop tomove said releasing member out'of engagement with said ratchet wheel assaid element is moved from a non-stopping towards a stopping position.14. Automatic stopping mechanism comprising in combination an elementpivoted to swing about a fixed axis from a non-stopping into a stoppingposition, a latch pivoted to swing about a fixed axis and arranged toengage said element to hold said element in a non-stopping position,yielding means' connecting said element and said latch and tending torotate said element from a nonstopping into a stopping position. asupporting member pivotally connected to said element and arranged tooscillate with respect thereto, a fixed stop arranged to be engaged bysaid ing member pivotally connected to said supporting member androtatable with respect thereto, I a i stop carried by said releasingmember and arranged to engage said sup-' porting member, and yieldingmeans con meeting said second mentioned stop and said element, saidreleasing member being arranged to be actuated by said ratchet wheel toactuate said latch, to release said element, and said supporting memberbeing arranged -to slide against said fixed stop to move said releasingmember out of engagement with said ratchet wheel as said element ismoved from a non-stopping towards a stopping position. Y I

15. An automatic stopping mechanism comprising in combination a movableelement normally held in non'stopping position, releasable meansnormally holding said element in non-stopping position. re leasing meanscarried by said element, a ratchet wheel rotatable about a fixed axisand adapted to move said releasing means a ainst said releasable meansto release: said e ement, and means to move said element, when released,into stopping position and said releasing means out of operativeengagement with said ratchet.

. 16. In, an automatic stopping mechanism the combinationiof a membermovable from a non-stopping to a stopping position, means-tending tomove said member to said stopping position, releasable means to holdsaid member in said non-stopping position, a lever pivoted to saidmember, a rotating element, means to rotate the same, .and means carriedby said lever, and directly engaging with and operated by said rotatingelement for forcing said releasable means out of holding engagement withsaid movable member, said movable member when released being operativeto move said lever su ortin member a releasv and said means carriedthereby,

rotating ele- .out of operative engagement with, said ment. c 17. In anautomatic stop ,ing' mechanism, the combination of a releasable-elementmovable back and forthbetween a non-stopping and a'stopping position,holding means to normally hold said element in a non-stopping position,mechanism movable with said element for actuating said holding meanstorelease said element, driving means for I actuating said mechanism andoperativeto to move said mechanism out of en move said mechanism againstsaid holding means, and means to move said element, when released, intostopping position and agement with said holding means and sai drivingmeans. w

18. In an automatic stopping mechanism, the combination of a, stoppingelement movable back and forth between a non-stopping and a stoppingposition,

, said element inia non-stopping position,

combination of an electric switch,

into operative engagement as the combination of a mova mechanism movablewith said element for moving said holding means and releasing saidelement, means for actuating said mechanism, and means for throwing saidactuating means and said mechanism out of trio circuit, a continuouslyrotating ratchet, -an arm connected to said switch, a pawl member inengagement with said ratchet, and connections between said arm and saidpawl member whereby the rotation of said ratchet first moves saidpawl'member into rigid relation with respect to said arm and thecontinued rotation of said ratchet moves, through said arm and pawlmember, said switch to break the electric circuit.

21. In an automatic stop mechanism the combination of .a stoppingmember, an arnr pivoted thereon, a pawl member pivoted to said arm,actuating means engaging said pawl member to transmit motion to saidstopping member, and means for disengaging said pawl member from saidactuating means.

V 22. In an automatic stop mechanism, the combination of a stoppingmember, retainmeans for holding le element, auto-- manual means formoving said" ing means. for holding said stopping member at the limitofits movement inone direction, means for moving said stopping men1berin the opposite direction, an arm pivoted to said stopping member, apawl member pivoted to said arm, andactuatingmeans engaging-said pawlmember to release said stopping memberfrom said retaining means. I

i 23'. In an automatic stop mechanism, the combination of a stoppingmember, retaining means for holding said stopping. member at the limitof its movement in one direction,

means for moving said stopping member in the opposite direction, anarmpivoted to said stopping member,

'oted to said arm, actuating means engaging" a pawl'membe'r pivsaid pawlmember to release said stopping member fromsaid retaining means, andmeans for disengaging said pawl member from said actuating mea 24. In anautomatic stop mechanism, the

combination of a stop -.member,movable from a non-stopping to a stoppingposition and having an abutment, retaining means engaging said abutmentto hold said member in non-stopping position, a spring tending to movesaid member into stopping pos'ition, and automatic means to move saidabutment with respect to said retaining means to disengage saidretainingmeans from said abutment, whereupon said spring will throw saidstopmember to stopping position.-

25. In an automatic stop mechanism, the

combinationof a stop member. movable from a non-stopping to a stoppingposition and having an abutment, retaining means engaging said abutmentto hold said memr in non-stopping position, a spring tending to movesaid member to stopping position, a ratchet arranged to becontinuallyrotated, a pawl in engagement with said ratchet, and

a connection between saidv pawl and said stop member .whereby therotation of said ratchet at firstmoves said pawl with respect to saidconnection and the continued movement of said ratchet moves said pawland through said connection moves said abutment to.disengage saidabutment from said retaining means.

.26. In an automatic stop mechanism, the combination of a pivoted stopmember having an arm extending therefrom, retaining means for holdingsaid member in non-stopping position, a spring for moving said member tostopping position when said member is released from said retainingmeans, a'continuously rotating ratchet, a pawl engageable with saidratchet, and a rigid connection between said pawl and said arm wherebythe rotation of said ratchet first moves said pawl into rigid relationwith respect .to said connection and the continued rotation of saidratchet moves said awl, said connection and said arm together 0 re useprising in lease said stop member from said retaining means.

27. Automatic stopping mechanism comcombination an element movable froma non-stopping into a stopping position, a member pivoted to swing abouta fixed axis for holding said element in a non-stopping position, meansto move said element, when released from said pivoted member, into astopping position, a ratchet wheel rotatable about a fixed axis,and-releasing means connected to said element and arranged to beactuated by said ratchet wheel to release said element.

In Witness whereof, I have hereunto set 15 m i hand this 4th day ofAugust, A; 1)., 19 4:.

, LLOYD Y; SQUIBB.

W'itnesses DAVID W. EVANS, CHARLES F. WILLARD.

